Mitel MX-ONE Missed Call / Call List on DBC442202

The MX-ONE web interface for configuring the IP phone config files does not provide the option to enable Call List (Missed Call) on the programmable keys of the DBC 442202.

The option can be enabled manually:

Got to the root folder of the web server (where the IP phone files are stored).
Backup the existing d42x02-config.txt file.
Edit the file:

[FunctionKeysDBC422]
Settings=5
CallWaiting=8
CallBack=1
CallList=9
Transfer=2
FreeOnSecond=3
MessageWaiting=7
Conference=0
EnablePBXStoring=YES

The IP phone will have to be restarted so as to read the new config.